Oil burner



June 19, 1928. 1,674,247

F. HARDINGE OIL BURNER Filed May s; 192s 2 sheets-sheet 1 .Eme 19,128.

l F. HARDINGE OIL BURNER Filed- May 5, 1923 2 sheets-sheet 2 PanareaJune 19, 1928.

UNITED S'l'A'IrliS PATENT OFFICE.

FRANKLIN HARDINGE, OF CHICAGO, ILLINOIS,vA-SSIGNOR TO HARDINGE BROTHERS,INC., F CHICAGO, ILLINOIS,.A CORPORATION 0F ILLINOIS` oIL BURNER.

A Application mea may 5, 1923. serial No. 636,867.

Myv invention relates to improvements in oil burners, and isparticularly concerned coupling said shafts constructed and arwithimprovements in that type of oil burner comprising-a retary-tubularatomizer for atomizing oil.,

The ob]e cts of m invention arem First: To provi e an oil burnercomprising a rotary atomizer, and means for' supplying oil to the lowerend of said atom-izer, the said means being located below they bottom ofthe fire box of the furnace so as to be removed as far as possible fromthe heat of the fire box, and positionedso that the air which issupplied to the spray of oil formed by the atomizer passes around thelower end of the atomizer at the point where the fue] is discharged intothe atomizer so as to keep the temperature of these parts as low aspossible;

Second: To provide an oil burner comprising an atomizer of improvedconstruction' Third: To provide an oilburner comprising a rotaryspindle, an atomizei` secured to one end of the spindle, and a pipeforsupplying oil to said atomizer, the atornizerv and the pipe being soarranged that the atomizer can be removed from the spindle withoutdisturbing the means for supplying oil thereto;

Fourth: To provide an oil burner comprising a rotary atomizer, a standpipe forl supplying fuel to the lower end of said atomizer, said pipeendlng 1n a tube whlch discharges the oil 'into the atomizer, the tubebeing constructed so as to offer as little re-` sistance as possible tothe movement of the atomizer;

Fifth: To provide an oil burner comprising a spindle, anatomiz/ercarried by s al'd spindle, means'for driving said atomizercomprising two shafts, and means for ranged so as to prevent the twoshafts from becoming permanently secured togetherv under long continuedusage, and to make it possible to readily separate said shafts.

Other objects of my invention will appear as this descriptionprogresses, reference being had to the accompanying drawings, inwhi'chFigure 1 is a vertical longitudinal section through aA portion of afurnace and oil burner embodying my invention;

Figure 2 is an enlarged sectional detail line 3 3 of Figure 2;

showing certain features of construction of my improvedmeans forsupplying oil to Figure 4 is a side elevation of the upper end of thestand pipe forming a part of my invention, and

Figure 5 isa vertical transverse section taken on line 5-5 of Figure 1.

Throughout the several views, similar reference characters are used forreferring to similar parts, and the several sections are taken lookingin the direction of the small arrows. 4

f rlhe embodiment of my invention, which I have illustrated herein,comprises a bed plate 10 which is preferablysupported in a depression 11in a cement Hoor, and a base plate 12 upon which is removably supportedthe head 13 which forms a supportfor the antifriction bearings 14 and15. A hollow spindle 16 is rotatably mounted in the bearings 14 and 15,land has secured to its lower end the bevel 'pinion 17 which meshes withthe bevel gear 18. The head 13 is hollow and forms a reservoir for oilfor lubricating the bearings 14 and 15 and thecontacting surfaces of thegears 17 and 18. The head also comprises a chamber 19 whichcommunicateswith the portion of the head housing the head above the sleeve 22providesl means for .receiving al portion' of the lubricant thrownupwardly by the gear 18, and carrying it tothe contacting surfaces of'the shaft 21, sleeve 22, and the bearing 23.

The vouter end of the stub shaft 21 is reduced in cross section, asshown at 25, and the portion 26 thereof tapers inwardly for a purposewhich will later be referred to. For driving the shaft 21, I provide thedriving shaft 27, the inner end ofwhich is reduced in cross section, asshown at 28, and an intermediate portion 29 of which tapers outwardly.Tol enable the driving shaft 27 t0 be easily attached to and detachedfrom the stub shaft 21, I -provide the coupling sleeve 30, the outersurface of which tapers outwardly. A pair 'of keys 31 and 32 located intwo shafts and in the sleeve 30 provide means for connecting the ends ofthe two shafts to the sleeve, and thus to each other. I also make use ofa set screw 33 for securing the sleeve 30 to the outer end of the stubshaft 21. The head is provided with a hollow tubular extension 34 forclosing the coupling 30. The shaft 27 passes through an opening 35 inone end of this tubular extension, and the lower side of this opening isbeveled downwardly and inwardly, as shown at 36, to drain into the headany oil 'which may reach this opening.

I prefer to fill the passageway 24 with waste, 37, and to mount a feltwasher ,38 u on the tapered portion 26 of the stub slihft. By theconstruction just described, I provide means for detachably'connectingthe adjacent ends of the two shafts 21 and 27, and which means willalways remam lubricated, thereby insuring the easy rej moval ofthe'shaft 27 from thehead so as to permit the latter to be removed andreplaced by another in case repairs thereto become necessary.

A portion of the oil passing through the passageway 24 and the wasteconnected therewith will find its way onto the tapered portion 26 of the.shaft 21. Due tothe shape of this portion ofthe shaft, theoil willgradually travel outwardly underthe influence of centrifugal force andfind its way along the contacting` surfaces of the sleeve 30, the twoends of the shaft, and the keys 31 and 32, thereby keeping these parts,thoroughly lubricated. The washer 38 will prevent an excessive amountof lubricant from "working outwardly al'on `the shaft 21, but if anexcess of lubricant s ould collect in the coupling, the outwardlytapered portion 29 of the shaft 27 will tend to return this lubricant tothe coupling, and if a-nylubricant should work outward y along thisshaft, it will bey thrown off by the shoulder 40 on the shaft 27 andreturned to the headby the walls of the opening The tube 41 is mountedin the splndle -16 and carried by the screw threadedv plug 42 mounted inthe-lower side of the head.,

This tube vextends upwardly in the spindle 16 to a point adjacent theouter end ofthe spindle which is counterbored, as shown at 43. A thimble44 having thereduced end portions 45 and 46 is inserted in the bore ofthe spindle immediately below the counterbore 43 so .that its outerreduced end 45 forms with the adjacent wall of vthe spindle an annularrecess 47, and its inner reduced end 46 projects into the ,upper end ofthe tube 41.

A tubular outwardly Haring atomizer 48 `is secured to the upper end ofthe spindle 16 by means of a screw threaded connection 49. `F orconvenlence 1n manufacture, I have4 illustrated this atomizer as beingformed of two parts secured together by a screw threaded connection 50."Ihe lower end o f t-he lower section of the atomizer is preferablyprovided with facets 51 for co-acting with the jaws of a wrench, bymeans of which the atomizer can be, removed from the spindle. Thespindle is also provided adjacent its outer 'end with facets 52 forreceiving the jaws of a wrench 53, the handle of which may be providedwith an opening for receiving the pin 54 carried by a projection 55formed on the head. In this manner, thel spindle can be anchored whilethe atom! izer isl being unscrewed therefrom. The upper end of theatomizer is provided w1th a plurality of radially extending fan blades56, and projects through an air controlling ring 57 carried by thesleeve 58 and the neck ring 59 upon which the sleeve 58 is adjustablmounted. The details of construction o the ring 57, the sleeve 58 andneck 'ring 59 are clearly' set forth and claimed in the co-pendingapplication led jointly in my name and that of Benjamin H. Connor, Case1, of even date herewith, and further description thereof appears to beunnecessary.' Y

For supplylng oil to the atomizer 48, I rovide a stand pipe 60 which issupported y the pedestal 61 and-extends upwardly 'y through the tube 41andthe thimble' 43.- in spaced relation thereto, sov as to .provide apassageway 62 for air. Fuel is supplied to the loweru `end Iof the standpipe 60 through ther pipe 63', which ma be connected with any suitablesource o oil under pressure. y.

The upper end of the stand pipe 60 -is provided with a cap 64 which ispreferably threaded onto the upper end of the stand pipe, as shown inFigure 2. This cap is provided with an innerannular passageway 65 whichcommunicates with openings 66 formed in the sides. of the, upper end ofthe stand pipe. Tubes 67, having their ends in serted in the cap l64,and communicating with the annular passageway 65, extend downwardly andinto the annular space 47 formed between the spindle and the upperreduced end 45 of the. thimble 44. The

lowerends of these tubes are attened', as

shown at 68, so that when the spindle' and the atomizer secured theretoare rotating, the edges of these tubes will offer `comparatively slightresistance to the movement of of oil upwardly to the atomizer.

It sometimes becomes necessary to clean the interior surface of theatomizer described above by inserting a poker 69, or

some other suitable instrument, in the atomlzer and gradually drawing itupwardly while the atomizer is in motion. To prevent this instrumentfrom injuring the tubesv which is mounted upon the upper end of the.

cap. This end of the cap is preferably formed with facets 7l forreceiving a wrench so that the cap and the tube 67 may easily beremoved, if necessary.

The construction just described is such that the atomizer 48 vcan beunscrewcd and easily removed from the furnace without the necessity ofdisturbing the stand pipeor the means secured thereto .for dischargingfuel into the atomizer. It will also be noted that the latter means arelocated at a distance considerably below the bottom wall 72 of the l tomwall of the fire box of the furnace, I

parently being due to two causes.

have found that there is very littler tendency for the fuely to depositthereupon, this ap- In the iirst place, these means are located so'thatthe heat from the irebox does notfread-ily impinge thereupon, and, inthe Isecond place,

they are located in the current of ai'r which is supplied to the sprayformed by the atomizer, so that'this current of air tendsto keep theseparts at a comparatively low temperature.

I have not described the details of construction of the bed plate, baseplate, and the head of this burner, because these v`fea.

tures are all clearly described and claimed in A my copendingapplication, Seriall Number 572,455, tiled July 3, 1922.

IVhile I have described the details 'of 'construction of the preferredembodiment of my invention, it is to be clearly understood that myinvention is not limited to these de# tails, but is capable of otheradaptations and modifications within the scope of the appended claims. Y

Having thus described my invention, what I lclaim is:

1. An oil 'burner comprising a head havinga hollow spindle rotatablymounted therein, a tube' supported in said hollow spindle and extendingupwardly to a point adjacent the upper endof said spindle, a thimblehaving reduced ends mounted in the `upper end of said spindle, one endof said thimble projecting downwardly into said tube, and the other endof said thimble form- -ng an annular Aspace between it and said spindle,va stand pipe .extending upwardly throughl said tube and said thimbleand in spaced relation thereto to form an air passageway, a cap closingthe upper end of, said stand pipe and carrying a disfharge tubeextending downwardly into the annular space between the upper end ofsaid thimble and said spindle, and a tubular outwardly flaring atomizerdetachablysecured to the upper end of said spindle.

2. An oil burner comprising a head having a hollow spindlerotatablylmounted therein, a tube supported in said hollow spindle andextending upwardly to a point adjacent the upper end of said spindle, athimble having one end projecting downwardly into said tube, andtheother end of said thimble forming an annular space between itv and saidspindle, a stand pipe extending upwardly through said tube and saidthimble and in spaced relationA thereto to form an air passageway, a capclosing the upper end of said stand pipe and carrying a discharge tubeextending downwardly into the annular space between the upper end ofsaid thimble and said spindle, and a tubular outwardly flaring atomizerdetachably secured to the upper end of said spindle.

3. An oil burner comprising a head having a hollow spindle'rotatablymounted therein', a thimble arranged to form an annular space between itand said spindle, a stand pipe extending upwardly through said tube andsaid thimble and in spaced relationl thereto to form an air passageway,a cap closing the upper end of said stand pipe and carrying a dischargetube extending downwardly into the annular .space between thel upper endof said thimble and said spindle, and a tubular outwardly flaringatomizer detachably secured to the upper end of said spindle.

f4. An oil burner comprising a rotatable hollow spindle, a thimblearranged to form an annular space between it and said spindle,

a stand pipe extending upwardly through said spindle and said thimbleand in spaced relation thereto to form an air passageway, a dischargetube carried by said stand pipe and extending downwardlyi-nto theannular space between` the .upper end` ofisaid thimble and said spindle.and a tubular atomizerdetachablysecured to the upper end, of saidspindle. e s

5. 'An oil burner comprising a hollow spindle, a tubular atomizercarried by the upper end of said spindle, a'stand .pipe extendingthrough said spindle in spaced relation to the walls thereof for formingan air passageway, a discharge tube carried by the upper end of saidstand pipe for supplying oil to said atomizer nozzle, and a disc carriedby the upper end of said stand pipe for protecting said discharge tubefrom injury by cleaning instruments inserted in said atomizer.

6'. An oil burner comprising a hollow spindle, a, tubular atomizercarried by the upper end of -said spindle, a stand pipe eX- tendingthrough said spindle, a discharge tube carried by the upper end of saidstand pipe for supplying oil to said atomizer nozzle, and means carriedby the upper end of said stand pipe for protecting said *clisoharge tubefrom injury by cleaning instruments inserted in said atomizer.

7. An oil burner comprising a hollow spindle, a tubular atomizer carried`by the upper end of said spindle, a stand pipe extending through saidspindle, a discharge tube carried by the upper end ofsaid stand pipe forsupplying oil to said atomizer nozzle, and means for protecting saiddischarge tube from injury by cleaning instruments inserted in saidatomizer.

8. A fuel oil burner comprising a gear casing, a hollow vertical spindlejournaled therein, a horizontal drive shaft therefor,

gearing therebetween within the casing, a tube extending upwardly fromthe bottom of the casing and within the spindle and providing an upwardair passage, the lower end of the tubevbeing open to the atmosphere, afuel feeding stand pipe extending upwardly through said tube, a tubularthimble member secured at a mid-point thereof to the in l ner wall ofthe spindle, the thimble above said securement forming with the innerwall of the spindle an annular trough, and below said securementinwardly overhanging the upper end of said tube, means above saidsecurement for delivering fuel oil from said stand pipe to'the innerwall of the spindle, and an outwardly flaring tubular atomizing nozzlesecured to the spindle above said securement.`

9. The combination with' an oil burner.

from the stand pipe to the inner surface of,

the atomizer,-of,means for catching liquid fuel which may descend theinner walls of the atomizer, and for preventing such liquid fuel fromentering said lubricant containing'case, said means comprisin a tubularmember centrally arranged within the spindle at a spaced distanceinwardly from the inner wall thereof, and meansintermediate the ends ofsaid member for securing it to said spindle to rotate therewith andconstituting a partition between the spindle and the tubular member, theupper end of the tubular member forming between it and the spindle aliquid fuel receiving trough. and the lower end of the tubular memberformlng an inverted trough with the spindle which trough receives theupper end of said tubular wall.

In witness whereof, I hereunto subscribe my name this 21st day of April,1923.'

FRANKLIN HARDIN GE.

